[Boost-users] Using boost::lamba with a vector of shared_ptr's

From: Allen Bierbaum (allenb_at_[hidden])
Date: 2003-11-20 17:57:54

Hello all.

I am having trouble with the boost lambda library.  I am convinced that 
my troubles come from some little thing I am overlooking, but for the 
life of me I can't seem to find the problem.  I have been looking at it 
for the entire afternoon with no solution in sight.

I have included some sample code below showing the basic idea of what I 
am trying to accomplish.  Can anyone provide me with a working solution?

The summary is:
- I have a vector of shared_ptr's to a class A
- That class has a method that returns a value I would like to test for 
in a find_if call

============================================================

namespace bl = boost::lambda

class A
{
    int getInt();
};

class Foo
{
    A bar();
}

std::vector<shared_ptr<Foo> > foos;
shared_ptr<Foo> foo_ptr;
A test_val;

test_val = (bl::_1 ->* &Foo::bar )(foo_ptr);

int find_int = 10;
iter found = find_if(foos.begin(), foos.end(),
                      (bl::_1->* &Foo::bar).getInt() == child_guid);

====================================================================

Can anyone tell me how I can call a method from a lamda method iterating 
over a sequence of shared_ptrs?   And then how do I have this method 
also call another method?

Thanks,
Allen